Glue applying apparatus



May 22, 1934.

I M. J. MILMOE GLUE APPLYING APPARATUS Filed Feb. 1, 1932 6 Sheets-Sheet1 YINVEX'TOR.

"dawn [9x 9 ATTORNEYS.

232 393% M. J. MILMOE 9 3 v I GLUE APPLYING APPARF'E'US Filed Feb. 1,3.952 6 Sheets-Sheet 2 l3 ,4- we May 22, 1934.

M. J. MILMOE ,960,228

GLUE APPLYING APPARATUS Filed Feb. 1,, 193?. 6 Sheets-Sheet 5 INVENTOR.

May 2, 193%. M3. MILMOE p w GLUE APPLYING APPARATUS Filed Feb. 1, 1932 6Sheets-$heet 6 z 1 1 I a e I ".1 a -T Ha I K g a g; K I I w Q i m rvNVENTOR. ZWW kww Patented May 22, 1934 PATENT OFFICE GLUE APPLYINGAPPARATUS Michael J. Milmoe, Glen Ellyn, Ill., assignor to 'F. B.Redington 00., Chicago, 111., a corporation 01' Illinois ApplicationFebruary 1, 1932, Serial No. 590,062

15 Claims.

The present invention relates to wrapping machinery and particularly toglue applying mechanism for applying glue to certain desired parts sothat the wrapper may be properly sealed. The

invention is shown as applied to'a machine in which cardboard cartonsare provided with flaps which are folded in overlapping relation witheach other and one of the flaps is provided with glue on one surfacethereof so that the same may be sealed over others of the flaps to holdall of the flaps in sealed position. However, my invention is notnecessarily limited to cartons having flaps, but is applicable to othertypes of wrapping in which glue is applied to a part during the wrappingprocess. a p

This application is a continuation in part of 'my application Serial No.356,933 filed April22, 1929 for new and useful improvements in cartonfilling machines.

One object of this invention is to provide an improved apparatus forapplying glue to the desired parts, in the present instance these partsbeing the flaps of the cartons.

' Another object of this invention resides in the novel means forpreventing the accumulation of dried glue on the glue applyingapparatus, thereby insuring a more uniform application of the glue tothe flaps.

Another object of this invention is to provide a rotatable glue applyingdevice for applying the glue in predetermined quantities to the flaps ofthe cartons. More particularly this rotatable member takes the form of aroller to the surface of which the glue is applied and in which means isprovided for regulating the thickness of the film of glue on the glueapplying roller.

More specifically, my invention has for its object the provision ofmeans for insuring that only a predetermined quantity of glue willremain on the surface of the glue applying roller at a predeterminedportion of the surface of said roller. Other objects of this inventionwill appear hereinafter as the description thereof proceeds, the novelarrangements and combinations being clearly set forth in the appendedclaims.

Referring now to the drawings Fig. 1 represents a front elevational viewof a portion of the machine embodying my invention and showing the glueapplying apparatus in ele- 59 vation;

Fig. 2 is a plan view of the mechanism shown in Fig. .1; v

Fig. 3 is a section taken substantially along the line 3-3 of Fig. 1;

Fig. 4 is a section taken substantially along 4 which in turn arecarried by the side rails 5 on the line 4-4 of Fig. 1 with parts of thebroken away for the sake of clearness;

Fig. 5 is a view similar to Fig. 4 showing the parts in a differentposition of adjustment than illustrated in Fig. 4;

Fig. 6 is a vertical section through one of the glue applyingmechanisms, the particular glue mechanism being that shown at the rightin Fig.

3 and looking in the direction from left to right in Fig. 1: Fig. 7 is aview of the side of the glue applying mechanism shown in Fig. 6 withvarious parts of the actuating means thereof removed for the sake 'ofcleamess; 1

apparatus I Fig. 8 is a fragmentary view of a portion of the glueapplying apparatus" shown at the right in Fig. 3;

Figs. 9 and 10 are views of thefolding meansfor folding the glued flapsagainst the other flaps;

Fig. 11 is an enlarged plan view of one of the 7 glue applyingmechanisms; ,Fig. 12 is a fragmentary plan viewshowing a modifiedadjustable member for, adjusting the position of the scraper;

Fig. 13 is'a side elevation of the device ustrated in Fig. 12; and

Fig. 14 is a fragmentary side elevational view of the device seen inFig. 13 and looking from the rear in Fig. 13.

Referring now to the drawings, it is seen in Figs. 1 and 2 that there isa hopper 1 containing a stack of unopened cartons 2 which rest on thesupport 3 extending longitudinally of the machine from left to right andsupported bythe supports the frame 6 of the machine. The frame 6 is openbetween theside rails 5 for a purpose which will appear presently. I

Arranged between the support 3 and the adjacent portions of the siderails 5 are a pair of bars 7 which form a transport member fortransporting the cartons from the hopper 1 to successive positions alongthe support 3. The transport members are connected at their ends bysuitable tie members and thattie member at that end adjacent the end ofthe hopper carries a device designated generally as 8, for stripping thecartons from the hopper and feeding the same to an initial position onthe support 3. This means is more fully described in my aforementionedapplication and no further description thereof is thought to benecessary in order to adequately describe the invention being claimed.Thetransport members 7 are provided with projectionsil,

10 and 11, which projections assist in conveying '110 the cartons alongthe support and also assist in opening the cartons. The means foropening the cartons is more specifically set forth in my aforementionedapplication.

As the cartons are carried along the support 3 by the projections 9, and11, there is some tendency for the same to return to the shape whichthey occupy in the hopper 1 and in order to keep the cartons open Iprovide a presser bar 12 carried by a plurality of arms 13 pivoted at 14to the frame 6. The presser bar 12 is also provided with a cross piece15. One of the arms 13 and the cross piece 15 carry folding members 16which fold corresponding flaps at opposite ends of the carton intofolded position over the ends of the cartons. The particular mechanismfor folding the flaps of the cartons is not important to the presentinvention, it being sufficient to state that the flaps at each end arefolded into compacted position against the end of the carton with theexception of one flap to which the glue is to be.

applied. The glue is then applied to this flap and the flap foldedagainst the other flaps to complete the package. The cartons thereforare fed in-- termittently along the support 3 until they arrive at theglue applying position indicated by A in Fig. 1. At this position thecarton comes to rest and the glue is applied to the inside surfaces ofthe flaps. The transport members '1 are carried by parallel arms 1'!pivoted to rods 18 which are secured toboth of the transport members.The arms 1'7 are pivoted at 18' to arms 19 of bellcranks pivoted at 20.The bellcranks have the upwardly extending arms 21, one of which isprovided with a projection 22 carrying a roller 23 engaging the camgroove 24 of .a cam'25 secured to the cross shaft 26 mounted in bearings2'1 and 28 in the brackets 29 and 30 provided on the front and rear ofthe machine respectively and secured to the base 31 thereof. A cam 30also secured to the shaft 26 has a cam groove 31' therein in which theroller 32 is adapted to travel. This roller 32 is carried by aprojection 33 on the arm 34 pivoted to the shaft 20. The shaft 20 issupported by the bracket 35 and the upstanding web 36 of the frame. Theupper end of the arm 34 is connected by a link 37'to the arm 17. Thearms 21 of the bellcranks are connected by means of the link 38 so thatthey will move in unison with each other. s

The operation of this mechanism is as follows: The cam 24 is adapted tooscillate the bellcranks and cause upward movement of the arm 17. Thecam 30' is adapted to oscillate the arm 34 and cause lateral movement ofthe arms 17. Since thecams 25 and 30 are operating at the same timethere is a combined effect on the transport member 7. This combinedeffect is one which causes the transport member 7 to move first to theright to carry the cartons along the support 3 and I bevel gears 39 and40 mounted on the cross shaft 26 and the main drive shaft 41respectively. The main drive shaft 41 is mounted to rotate in the duringthe rotation of the roller.

bracket 30 and in other brackets spaced along the base 31, but notillustrated in these drawings, as their construction does not form anypart of this invention. The bracket 30 also supports a shaft 42 uponwhich various arms are mounted for actuating other parts of themechanism not disclosed in these drawings, but disclosed in myaforementioned application.

As already stated, when the cartons reach the position A, the flaps areall folded with the exception of one flap at each end of the carton.

In Fig. 4 these flaps are indicated by the refer;

ence numeral 43 and are shown extending down- Wardly with their innersurfaces facing outwardly. While the flaps are in this position the glueis applied to the outwardly facing portions there of. This glue applyingmechanism is illustrated quite clearly in Figs. 4, 5, 6, '7 and il whiledriving I will describe only one of the glue applying means as it willbe understood that the other is constructed in substantially the samemanner, ex cept that the glue applying mechanism shown at the right inFig. 4 is provided with a reversing gear to cause both of the glueapplying rollers 44 to rotate in opposite directions. The glue applyingtrough 45 hasbearings 46 for supporting the shaft 4'7 of the glueapplying roller 44. The glue applying trough also has a shaft 48pivotedin bearings 49 at one end of the trough and this shaft carries ascraper 50 (see particularly Figs. 6 and 11) having an edge 51 thereofadapted to engage the surface of the roller now proceed to describe thismechanism and the means for actuating the rollers.

The shaft 48 carries an arm 53 at one end thereof and outside of theglue applying trough 45. This arm 53 has a split bearing 54 so that thesame may be securely attached to the shaft 48 by means of the clampingscrew 55. The end of the arm 53 has a recess 56 adapted to receive thespring 57, the other end of the spring bein arranged within the recess58 in a projection 59 on the side of the glue trough 45. It is thereforeclear that the spring normally urges the shaft 48, as viewed in Fig. '7,in a counter-clockwise direction, thereby lifting the scraping edge 51out of engagement with the surface of the roller. Means is provided,however, for preventing this movement, except at predetermined timesThis means is perhaps best illustrated in Figs. 1, 4, 5, 8 and 11. Anarm 60 having a split sleeve 61 arranged over the shaft 48, and aclamping nut 62 for securing the sleeve to the shaft is adapted to abutagainst a pin 63 mounted on the arm 64 pivoted to the shaft 65 mountedin the bearing bracket 66 secured to the upper part 6 of the frame ofthe machine, The arm 64 also has a shaft 6'7 secured thereto and thereis a roller 68 rotatably mounted on this shaft. The roller 68 engagesthe cam 69 secured to the shaft 70 which is rotatably mounted in thebearing 71 in the means therefor is ibest illustrated, perhaps inFigs. 1. 2 and 3.

bracket 66 and bass sprocket 72 (see particularly Fig. 3) securedthereto at the other end thereof. The cam 69 has a fiat portion 73 andthe remaining portions of the cam are equi-distant from the center ofrotation thereof. A spring 74 normally urges the arm 64 in a directionto bring the roller 68 into engagement with the periphery of the cam 69.

A gear 75 is also secured to the shaft and rotates therewith. This gearmeshes with an idler gear 76 secured to the shaft 77 rotatably mountedin the bearing 78 on the bracket 66 and this idler in turn meshes with agear 80 secured to the shaft 47 to which the glue applying roller 44 issecured. The idler 77 is omitted in the arrangement shown at the left inFig. 4 and the gears andare directly in mesh with each other to causethe'glue applying rollers 44 to rotate in opposite directions when theshafts 70 are rotated in the same direction.

The gear 75 has one more tooth thereon than does the gear 80. With thisarrangement the glue applying roller rotates fully more than onecomplete revolution each time the gear 75 is rotated through onecomplete revolution and the gear 75 is adapted to be rotated once foreach rotation of the cam shaft 26, or once between the presentation ofone carton and the presentation of the next succeeding carton to amechanism which will be described presently.

The sprockets 72 have chains 73' trained thereover and over thesprockets 81 on the main drive shaft 41. The chain 73 at the left inFig. 3 is also trained over idler pulleys 82. The sprockets 81 and 72are the same size so that one complete rotation of the shaft 41 willcause one complete rotation of the shafts 70 and slightly more than onecomplete revolution to the glue applying wheels 44.

While the flaps are having the glue applied thereto the same restagainst the abutments 83 (see particularly Fig. 4) and these abutmentstend to throw the flaps in the direction of the rollers 44. Prior to thearrival of the flaps opposite the periphery of the glue applyingrollers, the same are held downwardly in a substantially vertical planeby the folding members 84 (see particularly Fig. 7) and "are releasedwhen opposite the glue applying rollers so that they may be thrown intoengagement with the periphery thereof. i

The operation of this device is as follows: The cartons are successivelypositioned at the glue applying position and the flaps thrown outwardlytoward the periphery of the rollers 44. Each of these rollers is drivenby the gearing previously described and in a direction towards thecarton and downwardly on the side of the rollers adjacent the carton. Asthe shaft 70 rotates, the flat portion '73 periodically comes oppositethe roller 68 and thespring 74 moves the arm 64 upwardly to rotate theshaft 65 about its pivot and through the intermediacy of the parts 60,61, 62, and 63'lift the scraper 50 to bring the scraping edge 51 out ofengagement with the periphery of the roller and thus permit a smallquantity of glue 85 to remain on the periphery thereof. The scraper isagain pulled down against the periphery of the roller as soon as theflat spot is out of engagement with the roller 68 and as a result, theremaining portion of the periphery is scraped free of the glue until theflat portion 73 again arrives adjacent the roller 68.

Now since the gear 75 has one more tooth than the gear 80, the roller 44will rotate more than one complete revolution'for each revolution of theshaft 70 and as a result each time the scraper is raised, the glue 85which is permitted to remain on the periphery of the roller is on adifferent portion of the periphery. This is extremely important inviewof the fact that if the glue were retained on the same portion of theperiphery at all times, the result would be that all of the glue wouldnot be wiped oil from this portion of the periphery by the flaps of thecartons, but instead, a portion of the glue would remain on theperiphery of the roller and harden thereon, making successive layers ofglue which after a time acquire a thickness suificient to prevent anyfresh glue from passing beneath the scraping edge 51 of the blade. As aresult, the glue cannot be applied to the cartonswhich come along afterthis layer of hardened glue has been formed on the periphery of theglueapplying roller. However, with the arrangement shown in the drawings,all portions of the periphery are scraped by the scraper, except duringthose few revolutions during which the portion of the periphery isbeneath the layer of glue permitted to remain on said roller.-

It is obvious that the gear 75 may be provided -with 1, 2-, 3,4 or asmany more teeth than the gear 80 as may be desired, but the number ofgear teeth on the respective gears must be such that all portions of theperiphery thereof will be scraped at frequent intervals, to prevent theaccumula tion of hardened glue on the periphery thereof. Also the gear75 may have less teeth thereon than the gear 80 and the device wouldwork equally well.

-After the glue has been applied to each of the flaps, the transportmember carries the carton to its next position at which the flaps arefolded against the ends of the carton. The folding means is illustratedin Figs. 9 and 10, but the,

actutaing means therefor is not illustrated. However, this portion ofthe mechanism is fully described in my aforementioned co-pendingapplication. The U-shaped members86 having the inturned flap engagingportions 87 and 88 are arranged with their opposed surfacessubstantially in the planes of the ends of the cartons. The flaps 43(see particularly Fig. 10) pause between the lnturned ends 87 and 88 ofthe members 86 when the carton is moved to the flap sealing positionwhich is designated as B in Fig. 2. The inturned ends 87 hold the flapswhich have already been folded against the ends of the carton in theposition, and means (not shown) move the members 86 upwardly to bringthe inturned ends 88 into engagement with the flaps 43 so that the flapswill be carried upwardly and against the folded flaps with the gluebetween the flaps 43 and the folded flaps. The pressure of the fingers88 on the ends thereof secure the flaps against the ends of the carton.If desired, when the cartons are moved be provided for holding the flaps43 in position until the glue has set". However, this is not material toapplicant's present invention and no means is shown for this purpose.

Furthermore, the arrangement is such that only the required amount ofglue is left on the periphery of the roller. This has the advantage ofpreventing excess amounts of glue being ap- 135 to their next position C(see Fig. 2) means may It will be noted that by changing the angularposition of the arm 53, that the scraper may be moved closer to orfarther away from the periphery of the roller 44. This adjustment isused to the arm 53 in the other figures, and is secured foryieldingly-urging, the scraper blade 50 inan upward direction andthismeans is similar to the means shown in Fig. 7 except that it isprovided with a stop for limiting-the upward movement of the scraperblade 50 to thereby determine the thickness of the quantity of glue.

which remains on the periphery of the roller $4. .The spring indicatedby the reference numeral 100 surrounds the shank of a screw 101 providedwith ahead 102 used for the purpose of rotating the screw to secure anadjustment.

The lower end of the screw 101 is threaded into a lug 103 on the side ofthe trough 45, and has a collar 106 secured thereto near the upper endthereof. The shank of the screw passes through an enlarged opening inthe arm 53 and the collar 106-is adapted to engage the arm 53 and limitthe upward movement thereof at the time when the roller 68 is oppositethe flat portion on the cam 69. In other words, the thickness of thelayer of glue 85 which remains on the roller 44 is determined by theadjustment of the screw It will be obvious that those skilled in the artto which'this invention pertains can make other changes in the specificarrangement of the parts.

shown in the embodiment of my invention shown in the accompanyingdrawings without departing from the spirit of this invention, andtherefore I do not wish to have my invention limited except as set forthin the appended claims.

Having thus fully described my invention, what I claim as new and desireto obtain by Letters Patent is:

1. A carton filling and sealing machine in which glue is adapted to beapplied to some of the flaps on a carton for the purpose of-sealing saidcarton, comprising means for moving said cartons to successive positionsin said machine, one of said positions being a glue applying position,gluing mechanism located at said glue applying position comprising' acylindrical glue applying roller adapted to-rotate with the peripherythereof in engagement with the flap of the carton located at the glueapplying position, means for applying a predetermined amount of glue toone portion only of the peripheral surface of said roller, said portionhaving the .adjacent surfaces of said roller in a peripheral directon onboth sides thereof free of glue. andmeans for regulating saidpredetermined amount of glue which is to be applied.

at said position to remain on said roller, said 2. A device as claimedin claim 1 in which the means for regulating the amount of glue which isto be applied comprises a trough for supplying glue to the entiresurface of the roller, and a scraper for thereafter removing all butsaid predetermined amount of glue from said roller.

3. A glue applying device for carton filling machines comprising a. glueroller having the peripheral surface thereof entirely cylindrical, atrough for containing glue, means for supplying glue from said trough tosaid roller, a scraper adapted to contact with said roller to removeglue from said roller, and a means including a cam for lifting saidscraper entirely clear of said roller at predetermined intervals topermit'- a predetermined amount of glue to remain on said roller at apredetermined peripheral portion of said roller. i

4. In a glue applying apparatus for applying,

' glue to an article, the combination with a roller,,

of means for supplying glue to the periphery of said roller, 9. scraperfor scraping all of the glue from said periphery throughout the entirewidth scraper being adapted to scrape glue from different portions ofsaid roller during successive revolutions of said roller.

5. In a glue applying device for wrapping machines, the combination witha glue applying roller, of a trough in which said roller rotates, ascraper for scraping glue from the periphery of said roller and urgedinto contact therewith, and 'means for periodically raising said scraperfrom its engagement with said roller for permitting glue to passtherebetween and remain on said'roller, said means for raising saidscraper periodically being constructed to raise said scraper atdifferent times during different rotations of said roller.

6. A device as set forth in claim 5 in which said scraper is providedwith members for engaging other surfaces on said roller at all times toprevent accumulation of glue on said last mentioned surfaces.

7. A glue applying device for applying glue to the flaps of cartons in acarton machine comprising a glue trough, a roller journaled so that aportion of its periphery will travel in the glue carried by said-gluetrough, gearing for driving 130 said roller so that different portionsof the periphery thereof are presented to each succeeding carton towhich glue is to be applied, a scraper urged into engagement with theperiphery of said roller,

a cam, and means operatively connected with said scraper and engagingsaid cam, said cam being designed so as to control said last mentionedmeans with the same regularity that the cartons,

are presented to the glue applying rollers and;

for the purpose of raising said scraper from its contact with saidroller to thereby permit a predetermined amount of glue to pass beneathsaid scraper. v

8. A device as claimed in claim 7 in which said scraper may be quicklyadjusted for wear either of said scraper or of said roller and withoutaffecting the operative connections with said cam.

9. In a glue applying apparatus, the combination with a rotatableroller, a scraper adapted to engage the periphery of said roller, meansfor supplying the periphery of said roller with glue before it reachessaid scraper, and means for raising the scraper during the rotation ofsaid roller for a short interval of time to permit a portion of saidglue to remain on the periphery of said roller, said means for raisingsaid scraper being operable at different times during successiverotations of saidroller.

10. A device as claimed in claim 9 inwhich the means for raising thesaid scraper is operable each time the roller rotates more than onecomplete revolution.

11. In a glue applying apparatus, the combination with a glue applyingroller, a trough for supplying glue to said roller, a scraper fornormally engaging said roller to scrape the glue from the peripherythereof, a cam, means controlled by said cam for raising said scraper, agear rotatable with said cam, a gear rotatable with said roller androtated by said first mentioned gear, the gear teeth on said respectivegears being so arranged that the same rotate at different speeds, saidmeans being operable to raise said scraper at the same time during therotation of said cam on successive complete revolutions thereof.

12. A glue applying apparatus comprising a glue applying element movablefrom a glue receiving position to a glue applying position means adaptedto normally engage said element to scrape the glue supplied thereto fromthe surface thereof, means for periodically raising said .last mentionedmeans out of engagement with said element to permit a predeterminedamount of glue to be carried by said element to said glue applyingposition, and means for positively limiting the distance to which saidscraping means is raised away from the surface of said glue applyingelement to determine the thickness of the glue which remains on saidelement.

13. A device as set forth in claim 12 in which the scraping means isnormally positively pressed into engagement with said. element when incontact therewith.

14. In a glue applying apparatus, the combination with a roller which isrotatable to move glue from a glue supplying means toa glue applyingposition, a glue supplying means for supplying glue to said rollerthroughout the entire peripheral surface thereof, and a scraper havingan operative scraping edge engaging said roller for scraping the gluetherefrom before the glue reaches the glue applying position, and meansfor periodically raising said scraper out of contact with the peripheralsurface of said roller, said last mentioned means being operable toraise said scraper periodically at different times with respect to'afixed point on the periphery of the roller, whereby each time thescraper is raised, the glue is permitted to remain on said roller at adifferent position peripherally thereof, whereby the entire peripheralsurface of said roller is scraped free of glue at one time or anotherduring the operation of said roller, whereby solidifying of a layer ofglue on said roller is prevented.

15. In a glue applying apparatus, the combination with a glue applyingroller, means for rotating said roller to bring the periphery thereofadjacent a glue applying position, means for scraping all butpredetermined patches from the peripheral surface of said roller, meansfor pcriodically moving the scraping means out of contact with theperipheral surface of said roller at different times during successiverotations of the I MICHAEL J MILMOE.

